No. A short look at the specifications would have shown you. SMTP does not deal with folders, and POP3 is just a protocol to get an SMTP buffer from a server. Folder management came way later and uses other protocols.

POP3 itself does not expose a folder system, but it was invented at a time when a folder was considered a mailbox. Therefore, some systems support a <username>#<mailbox> login. Afterlogic actually has a good explanation here: